This Locking Chain Day Collar with Small Heart Padlock is made with nickel plated double linked chain and is to be worn at the base of the neck under clothes. A small heart-shaped padlock comes with this discreet day collar as well as 2 heart-shaped keys. The lock is very beautiful and has a high mirror shine. The heart padlock is not a security lock though and although does lock, it can be easily picked. Its quite dainty and is more of a symbol of ownership.